[morsch]

Well, the reference to its (purported) carcinogenity was edited away twelve days ago: https://en.m.wikipedia.org/wiki/Special:MobileDiff/118137387...

[graphe]

I looked at the source and it's OSHA. You'd do a blood test for lead, but it was due to it being inhaled and causing lung cancer. https://www.osha.gov/laws-regs/federalregister/2006-02-28-0

Ingestion wasn't mentioned, it's main danger is spray paint.